Loose-leaf binder



Sept. 3, 1929- I J. c. DAWSON v I 1,726,810

LOOSE LEAF BINDER Filed Dec. 28, 1926 A) 25 23 2171x5523 7: 61/7125 0',Dawson M 91/@{,

Patented Sept. 3, 1929;

JAMES c. Dawson, or w'n'nsrna GROVES, MISSOURI, ASSIGNOIR TO ELMA N.DAWSON,

F WEBSTER GROVES, MISSOURI.

LOOSE-LEAF BINDER.

Applicationflled December 28, 1926. Serial No. 157,466.

This invention relates to loose leaf binders, and has for its principalobject to provide a novel binder assembly that can be applied to avariety of uses now imperfectly served by other structures, and whichhas particular advantages in connection with flexible back binders ofthe class now generally fitted with double headed screw devices.

Other objects and advantages of the in- ]0 vention will become apparentas the descrip panying drawings, in which Fig. 1 is aperspective view ofa flexible back binder made according to this invention,

a portion of one leaf being-broken away and the binder mechanism beingunfastened and slightly displaced;

, Fig. 2 is a side elevation of the metallic portion of the binder;

Fig. 3 is a plan View of the same; and

Figs. 4 and 5 are transverse sectional views on the planes indicated bythe lines 44 and 55 of Fig. 3.

Referring to Figs. 1, 2, 3, 4 and 5, 1O indicates generallya flexibleback equipped with tongues 11 and 12, to which a stack of leaves are tobe fastened. In devices now in general tion is read in connection withthe accomuse these tongues are perforated and adjust-' able doubleheaded screwsv are ,inserted' through the tongues and the sheets to bebound.

According to this invention such screws are replaced by binder mechanismincluding a lower binder bar 13, an upper auxiliary floating binder bar14, and an upper binder bar 15. The bars 13 and 14 are equipped withtelescoping posts 16, the outer or. tubular sections 17 of which arecarried by the bar 14. The bar 13 is fixed in suitable manner to thetongue 11, and the bar 15 is similarly fixed to the tongue 12.

A single locking post 18, carried by the bar 13, projects upwardlythrough perforations in the bars 14 and 15, and has a head 19 forcooperation with a keyhole slot 20 in a latch bar 21, slidably mountedon the bar 15, by the pins 22 passing through the slots 23.

In order to prevent twisting in use the bars 14 and 15 are interlockedby the simple expedient of providing one of them with notches 24,adapted to receive tongues 25 on the other.

The head 19 is preferably carried by a screw 26 (Fig. 5), threaded inthe post 18, whereby the length of the latter may be varied, and hencethe capacity of the binder may also be varied.

The relative positions of the parts when the binder is in use areillustrated in Figs. 4 and 5. When it is desired to remove a sheet or astack of sheets, the latch bar 21 is operated to release the'head 19,when the upper binder bar 15, with its tongue and the correspondingportion of the back, may be swung to the left in Fig. 1 to a positionentirely clear of the remainder of the mechanism. The auxiliary binderbar 14, with a portion or all of the leaves, may then be readilyremoved, and after the desired changes have been made it can be replacedwithout any interference of the bar 15 with the tongue 12.

The advantage of this structure, and other forms that will readily occurto those skilled in the art overthe double headed screws now in commonuse, will be apparent from the foregoing description and the drawings.Insofar as I am aware, this is the first binder mechanism applicable toflexible back binders that will permit sheets to be readily removed andreplaced, and that can be relied upon in service.

I claim as my invention 1. In a loose leaf binder, a back, spacedtongues on the back, a lower binder bar secured to one of said tongues,posts on the lower binder bar adapted to extend through perforations insheets to be bound, an upper binder bar secured to the other tongue, 2.floating auxiliary upper binder bar having posts telescoping with postson the lower binder bar, projections on the ends of the upper binderbarengaging-notches in the ends of the auxiliary binder bar to hold saidbinder bars in alignment, and latch means carried by the upper binderbar for securing the bars in binding relation to sheets on the posts.

2. A commercial article comprising a lower binder bar, an auxiliaryupper binder bar,

telescoping posts carried by said bars, a main I upper binder bar lyingalong the auxiliary binder bar, a locking post on the lower binder barand projecting through the other bars,

er bar and projecting through the other bars,

and a latch bar slidably mounted on the upper binder bar and cooperatingwith the loc ing post to secure the bars together.

4. A loose leaf binder comprising top and bottom covers, a flexible backconnecting the covers, upper and lower spaced tongues between thecovers, a floating binder bar located between the tongues, two pairs ofsymmetrically disposed telescoping binder posts carried by the lowertongue and the floating binder bar, a centrally disposed locking postrising from the lower tongue, the floating binder bar and the uppertongue having openings aligned with the locking post, a

locking screw having threaded engagement with the locking post andhaving its upper end extending loosely thru said openings in.

the upper tongue and the floating binder bar, and a latch plate movablymounted on the upper tongue and having a locking engagement with thescrew to prevent separation of the tongues.

t 5. A loose leaf binder comprising top and bottom covers, a flexibleback connecting the covers, upper and lower spaced tongues between'thecovers, a floating binder bar 10- catedbetween the ton ues, two pairs ofsymmetrically disposed te escoping binder posts carried by the lowertongue and the floating binder bar, a centrally disposed locking postrising from the lower tongue, the floating disposed above the latchplate, and of greater width than that of the narrow portion of thekey-hole slot.

6. A commercial article com rising a lower binder bar, an upper binderer, a floatin binder bar disposed between the upper an lower binderbars, two pairs of symmetrically disposed telescoping posts carried bythe lower binder bar and the floating binder bar, an internally screwthreaded post rising from the middle of the lower binder bar, thefloating binderba'r and the upper binder bar having aligned openings, aheaded locking screw extending thru the openings in the upper floatingbinder bars and engaging the threaded interior of the locking post, andan endwise moveable latch bar mounted upon the upper binder bar andhaving a key-hole slot receiving the shafili of the locking screw.

7. Acommereial article comprising a lower binder bar, an upper binderbar, a floating binder bar disposed between the upper an lower binderbars, twopairs of symmetrically disposed telescoping posts carried bythe lower binder bar and the floating binder bar, an

internally, screw-threaded post rising from the middle of the lowerbinder bar, the floating binder bar and the upper binder barhavingaligned openings, a headed locking screw extending thru the openings inthe 11 per and floating binder bars and engaging the threaded interiorof the locking post, and an end- 'wise moveable latch bar-mounted uponthe upper binder bar and having a key-hole slot receivin the shankof-the locking screw, the floating inder bar and the upper binder barhaving a projection and notch engagement to maintain the bars inalinement.

In testimony whereof I aflix my signature. I

JAMES C. DAWSON.

